CN217880389U - Vehicle-mounted device and ETC system - Google Patents

Abstract

The utility model discloses a vehicle-mounted device and an ETC system, wherein the vehicle-mounted device comprises a main control module and a wireless radio frequency module connected with the main control module; the wireless radio frequency module comprises a radio frequency transceiving selector switch, a first balun, a second balun, a frequency modulation demodulation unit, a data packet processing unit, a register set and a transceiving antenna, wherein the register set is in communication connection with the main control module and is used for carrying out data transmission with the main control module; the register group is also connected with a data packet processing unit, the data packet processing unit is connected with an FM modem unit, the FM modem unit is connected with a radio frequency transceiving switch through a first balun and a second balun, and the radio frequency transceiving switch is connected with a transceiving antenna. The vehicle-mounted equipment is internally provided with a wireless radio frequency module which is used for transmitting relevant data to the road side equipment at a high speed or receiving issued data from the road side equipment at a high speed, so that the vehicle-mounted equipment can perform data transmission with larger data volume with the road side equipment in a short time.

Description

Vehicle-mounted device and ETC system

Technical Field

The utility model relates to the intelligent transportation field, the more specifically say and indicate an on-vehicle equipment and ETC system.

Background

Since 1996, a high-speed test is carried out in a capital airport in China, by 12 months and 31 days in 2019, national ETC users can be accumulated by 2.04 hundred million, and 2.46 million sets of ETC portals and corresponding power supply, communication and other infrastructure are built together. ETC is used as infrastructure of 'new construction' in the transportation industry, and lays a good foundation for developing comprehensive road network management, safe operation, intelligent maintenance, information service and the like facing to 'smart roads'.

Present ETC1.0 vehicle-mounted equipment data transmission rate only is 512Kbps, and the data bulk that can transmit in the short time is limited, and the application scene only can support access & exit transaction and route sign, or highway charging provides the payment service, under the high-speed prerequisite that needs promote highway service quality of wisdom, can't satisfy the intellectuality to data transmission's requirement.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model aims to provide an on-vehicle equipment and ETC system.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, the utility model provides a vehicle-mounted device, including a main control module and a radio frequency module connected with the main control module, wherein the main control module controls the radio frequency module to send data to be transmitted to road side equipment or receive issued data from the road side equipment;

the wireless radio frequency module comprises a radio frequency transceiving selector switch, a first balun, a second balun, a frequency modulation and demodulation unit, a data packet processing unit, a register set and a transceiving antenna, wherein the register set is in communication connection with the main control module and is used for data transmission with the main control module; the register group is also connected with the data packet processing unit, the data packet processing unit is connected with the FM modem unit, the FM modem unit is connected with the RF transceiving selector switch through the first balun and the second balun, and the RF transceiving selector switch is connected with a transceiving antenna; the radio frequency receiving and transmitting switch is used for switching the wireless radio frequency module to enter a transmitting state, and data to be transmitted are transmitted to the register group from the main control module, sequentially pass through the data packet processing unit, the frequency modulation and demodulation unit and the second balun and are transmitted to the receiving and transmitting antenna for transmitting; the radio frequency receiving and transmitting switch is used for switching the wireless radio frequency module to enter a receiving state, and the receiving and transmitting antenna receives the transmitted data, passes through the first balun, the frequency modulation and demodulation unit, the data packet processing unit and the register set in sequence and transmits the data to the main control module.

Furthermore, the fm modem unit includes a receiving path and a transmitting path, the receiving path includes a low noise amplifier, a first mixer, an analog-to-digital converter, an fm demodulator, a data limiter and 3 bandpass filters, the bandpass filter, the low noise amplifier, the bandpass filters, the first mixer, the bandpass filters, the analog-to-digital converter, the fm demodulator and the data limiter are sequentially connected to form a receiving path, and the transmitted data from the transceiver antenna is demodulated by the low noise amplifier, the first mixer, the analog-to-digital converter, the fm demodulator and the data limiter sequentially and then enters the data packet processing unit;

the transmitting path comprises a power amplifier, a second frequency mixer, a digital-to-analog converter, a frequency modulation modulator, a Gaussian shaping filter and 3 band-pass filters, the band-pass filter, the power amplifier, the band-pass filter, the second frequency mixer, the band-pass filter, the digital-to-analog converter, the frequency modulation modulator and the Gaussian shaping filter are sequentially connected to form the transmitting path, and data to be transmitted from the data packet processing unit are transmitted by the transmitting and receiving antenna after being modulated and processed by the Gaussian shaping filter, the frequency modulation modulator, the digital-to-analog converter, the second frequency mixer and the power amplifier in sequence.

Furthermore, the fm modem unit further includes a high frequency oscillator and a phase-locked loop, the high frequency oscillator is connected to an input end of the phase-locked loop, and an output end of the phase-locked loop is connected to the first mixer and the second mixer, and is configured to output the local oscillation signal to the first mixer and the second mixer.

The vehicle-mounted intelligent positioning system further comprises a positioning module and a gyroscope, wherein the positioning module is connected with the main control module and used for transmitting real-time positioning data to the main control module, and the gyroscope is connected with the main control module and used for transmitting the running state of a vehicle to the main control module.

And the data encryption storage module is connected with the main control module and is used for encrypting and storing data.

Further, the intelligent control system also comprises a CAN module, wherein the CAN module is connected with the main control module and is used for communicating with a vehicle, acquiring vehicle state information and transmitting the vehicle state information to the main control module.

Furthermore, the wireless internet access system further comprises a wireless internet access module and a Bluetooth module, wherein the wireless internet access module and the Bluetooth module are connected with the main control module, and the wireless internet access module is used for uploading or downloading data.

Further, the modulation mode of the wireless radio frequency module is FSK modulation.

In a second aspect, the utility model also provides an ETC system, which includes the vehicle-mounted device as described above, and a roadside device disposed at a roadside, wherein the vehicle-mounted device is disposed inside a vehicle, and the vehicle-mounted device transmits vehicle-related data to the roadside device at a high speed through a radio frequency module; or the vehicle-mounted equipment receives the issued data from the road side equipment through a wireless radio frequency module.

The road side equipment is connected with the edge calculation unit and used for issuing the online data from the edge calculation unit to the vehicle-mounted equipment through the road side equipment.

Compared with the prior art, the utility model beneficial effect be: the utility model provides an on-board unit and ETC system, specifically, be provided with wireless radio frequency module in the on-board unit, wireless radio frequency module is used for high-speed transmission relevant data to roadside equipment or receives the issue data that comes from roadside equipment at a high speed, makes on-board unit can carry out the data transmission of bigger data volume with roadside equipment in the short time; in addition, the data transmission supports direct connection transmission, the data are not required to be stored in FIFO cache to be queued and transmitted in sequence, and the data can be directly transmitted from a register group during data transmission, so that the operation is simpler and the development performance is higher.

The invention is further described with reference to the following figures and specific embodiments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic block diagram of a structure of a radio frequency module according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a fm modem unit according to an embodiment of the present invention;

fig. 3 is a schematic structural block diagram of a specific embodiment of the vehicle-mounted device of the present invention;

fig. 4 is a schematic block diagram of a specific embodiment of an ETC system according to the present invention;

fig. 5 is a schematic view of an application scenario according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

The first embodiment:

referring to fig. 1, the utility model provides an on-board unit, including host system 20 to and the radio frequency module 10 of being connected with host system 20, host system 20 controls radio frequency module 10 and sends and treat data to send to roadside equipment or receive the data of sending down that come from roadside equipment, makes on-board unit can carry out the data transmission of bigger data volume with roadside equipment in the short time.

As shown in fig. 1, the wireless rf module 10 includes a rf transceiving switch 11, a first balun 12, a second balun 13, a fm modem unit 14, a data packet processing unit 15, a register bank 16 and a transceiving antenna, wherein the register bank 16 is communicatively connected to the main control module 20, and is configured to perform data transmission with the main control module 20; the register group 16 is further connected with a data packet processing unit 15, the data packet processing unit 15 is connected with an FM modem unit 14, the FM modem unit 14 is respectively connected with a radio frequency transceiving switch 11 through a first balun 12 and a second balun 13, and the radio frequency transceiving switch 11 is connected with a transceiving antenna; the radio frequency transceiving switch 11 is used for switching the wireless radio frequency module 10 to enter a transmitting state, transmitting data to be transmitted to the register bank 16 from the main control module 20, and transmitting the data to be transmitted to the transceiving antenna for transmitting after passing through the data packet processing unit 15, the frequency modulation and demodulation unit 14 and the second balun 13 in sequence; the rf transceiving switch 11 is used to switch the wireless rf module 10 to enter a receiving state, and the transceiving antenna receives the transmitted data, passes through the first balun 12, the fm modem unit 14, the data packet processing unit 15, and the register bank 16 in sequence, and transmits the data to the main control module 20. When the wireless radio frequency module 10 of the scheme is used for data transmission, data entering the register group 16 can be directly transmitted without being stored in an FIFO buffer for queuing and being sequentially transmitted, and the data can be directly transmitted from the register group 16 when the data transmission is performed, so that the operation is simpler and the development is higher.

Specifically, the related functional modules forming the radio frequency module 10 have the following functions:

the rf transceiving switch 11 is used for switching between receiving and transmitting rf signals, and is capable of switching the rf module 10 to enter a transmitting state or a receiving state.

A first balun 12 and a second balun 13 for balanced (dipole antenna is of balanced type) and unbalanced (coaxial line/microstrip line is of unbalanced transmission) conversion.

The fm modem unit 14 is configured to modulate a radio frequency signal of the fm signal, or demodulate a radio frequency signal of the fm signal.

The packet processing unit 15 is used for packet processing, and since the received and transmitted data may exceed the single processing capability of the chip itself, the data to be transmitted and received is divided into packets (4 KB at maximum) of a certain size, and the data is packetized at the time of transmission and the packets are integrated at the time of reception. According to the scheme, the wireless radio frequency module 10 can divide data into data packets with a certain size during communication, the specific size of each packet of data is adjustable, the maximum data packet supports 4KB, the size of each packet of data can be adjusted according to the requirement of data transmission during actual use, and therefore the overall transmission efficiency is improved, and the adjustability of data transmission is improved.

The register group 16: the temporary storage instruction, data and address are used for operating each module and receiving, transmitting, storing and outputting data. The data of the register group 16 supports direct connection sending, does not need to be stored in FIFO buffer to be queued and sent out in sequence, can be directly sent out from the register group 16 during data transmission, and has simpler operation and higher developability.

Referring to fig. 2, the fm modem unit 14 of the present embodiment includes a receiving path and a transmitting path. The receiving path comprises a low noise amplifier 1402, a first mixer 1403, an analog-to-digital converter 1404, a frequency modulation demodulator 1405, a data amplitude limiter 1406 and 3 band-pass filters 1401, wherein the band-pass filters 1401, the low noise amplifier 1402, the band-pass filters 1401, the first mixer 1403, the band-pass filters 1401, the analog-to-digital converter 1404, the frequency modulation demodulator 1405 and the data amplitude limiter 1406 are sequentially connected to form the receiving path. When the main control module 20 controls the radio frequency module 10 to enter a receiving state, the transceiving antenna receives a radio frequency signal, a radio frequency signal (data transmitted by roadside equipment) from the transceiving antenna sequentially passes through the low noise amplifier 1402 to amplify a weak radio frequency signal received by the antenna from the air, an input high radio frequency is converted into a low intermediate frequency by the first mixer 1403, a received digital signal is converted into an analog signal by the analog-to-digital converter 1404, the radio frequency signal converted into the analog signal is modulated by the frequency modulation demodulator 1405, an input data signal is prevented from being too large by the data amplitude limiter 1406, finally, the radio frequency signal is demodulated and then enters the data packet processing unit 15 for performing packet processing to form a data packet, and the data packet enters the register set 16 and is directly transmitted to the main control module 20 through the network interface.

Referring to fig. 2, the transmission path of the present embodiment includes a power amplifier 1411, a second mixer 1410, a digital-to-analog converter 1409, a frequency modulation modulator 1408, a gaussian shaping filter 1407, and 3 bandpass filters 1401, and the bandpass filter 1401, the power amplifier 1411, the bandpass filter 1401, the second mixer 1410, the bandpass filter 1401, the digital-to-analog converter 1409, the frequency modulation modulator 1408, and the gaussian shaping filter 1407 are sequentially connected to form the transmission path. When the main control module 20 controls the wireless rf module 10 to enter a transmitting state, data to be transmitted from the data packet processing unit 15 sequentially passes through the gaussian shaping filter 1407, demodulates a radio frequency signal of a frequency modulation signal through the frequency modulation modulator 1408, converts an analog signal into a digital signal through the digital-to-analog converter 1409, amplifies the power of an input signal, converts a low intermediate frequency or baseband frequency into a high radio frequency (5.8 GHz frequency) through the second mixer 1410, outputs the converted signal, amplifies the power of the radio frequency signal through the power amplifier 1411, and transmits the amplified signal through the transmitting/receiving antenna.

As shown in fig. 2, a plurality of band pass filters 1401 are used in each of the transmission path and the reception path, and the band pass filters 1401 are used to limit frequency components in a pass (desired) frequency range, but attenuate (undesired) frequency components in other ranges to an extremely low level.

Referring to fig. 2, the fm modem 14 of this embodiment further includes a high frequency oscillator 1412 and a phase locked loop 1413, the high frequency oscillator 1412 is connected to an input terminal of the phase locked loop 1413, an output terminal of the phase locked loop 1413 is connected to the first mixer 1403 and the second mixer 1410 for outputting local oscillation signals to the first mixer 1403 and the second mixer 1410, and the local oscillation signals are input to the first mixer 1403 and the second mixer 1410 for mixing with the frequency of the received or transmitted signal to generate a specific frequency signal. Wherein the high frequency oscillator 1412 is used as a frequency source for the phase locked loop 1413, and the phase locked loop 1413 is used to generate a stable local oscillator signal from a fixed low frequency signal. The local oscillator signal is used for frequency mixing with a received or transmitted signal to generate a specific frequency signal.

In actual operation, the radio frequency module 10 of this embodiment has the following 5 common operating states: 1. standby; 2. sleep; 3. a PLL; 4. rx; 5. tx. The 5 operating states are switched with one another as follows:

1. after the radio frequency module 10 is powered on and reset or reset, the radio frequency module defaults to enter a Standby state, namely, the register set 16 defaults to power on and turn on the analog power supply and the crystal oscillator; the Sleep state and the Standby state are non-working states;

2. opening the PLL and then entering a working state;

3. the working state is a direct mode, active switching is needed, and an RX state (a receiving mode) and a TX state (a transmitting mode) need to be switched from a PLL working state;

5. the receiving mode and the transmitting mode can not be directly switched, and the receiving mode and the transmitting mode can be switched only by entering a working state.

In a specific embodiment, the radio frequency module 10 of the present disclosure is an RF chip, and the RF chip employs an FSK modulation method, specifically 2FSK; the communication frequency range is between 5.78-5.85GHz, the communication rate is about 4Mbps, the communication occupied bandwidth is about 4.5MHz, data is divided into data packets with certain sizes during communication, the size of each packet of data is adjustable, the maximum data packet supports 4KB, the size of each packet of data can be adjusted according to different requirements of transmission data during actual use, the whole transmission efficiency is improved, the adjustability of data transmission is improved, and meanwhile, each packet of data contains CRC check, so that the data safety is ensured. Compared with the existing vehicle-mounted equipment, the vehicle-mounted equipment using the radio frequency module 10 of the embodiment has higher data transmission speed, can perform data transmission with a road side device in a larger data volume in a short time, further realizes the vehicle-road coordination early warning and broadcasting, reduces the high-speed accident rate, and improves the experience of high-speed users; in addition, the highway operation information can be acquired in real time, data sharing is realized, the number of unconventional inspection times of management departments is reduced, and the labor cost is reduced. Based on dynamic continuous data, a decision basis is provided for emergency command, and reasonable scheduling is realized.

The vehicle-mounted equipment of the embodiment is provided with the radio frequency module 10, and the radio frequency module 10 is used for transmitting relevant data to the road side equipment at a high speed or receiving issued data from the road side equipment at a high speed, so that the vehicle-mounted equipment can perform data transmission with larger data volume with the road side equipment in a short time; in addition, the data transmission supports direct connection transmission, the data are not required to be stored in FIFO buffer to be queued and transmitted in sequence, and the data can be directly transmitted from the register group 16 during data transmission, so that the operation is simpler and the development performance is higher.

Second embodiment:

referring to fig. 3, the utility model provides an on-board device, still be provided with orientation module 40 on the basis of the on-board device scheme of first embodiment, display module 30, gyroscope 50, data encryption storage module 60, CAN module 70, functional modules such as wireless internet module 80 and bluetooth module 90 for on-board device has vehicle positioning, vehicle running state collects, vehicle information collects, multiple different functions such as early warning information show and the online, adapt to present increasingly higher vehicle road demand in coordination more.

Specifically, the positioning module 40 is connected to the main control module 20, and is configured to transmit real-time positioning data to the main control module 20, so as to facilitate reporting of path information and accurate distance reminding from an accident area. In one embodiment, the positioning module 40 can be one of a Beidou positioning module or a GPS positioning module.

Specifically, the display module 30 is connected to the main control module 20, and is configured to display the image-text information from the main control module 20, and display and remind the vehicle-road cooperative traffic early warning information in real time.

Specifically, the gyroscope 50 is connected to the main control module 20, and is configured to transmit the driving status of the vehicle to the main control module 20, record the driving status of the vehicle, and report the driving status, so as to facilitate improvement of highway owners on road services, for example: and the road end with excessive braking can be reminded in advance, and the like.

Specifically, the data encryption storage module 60 is connected to the main control module 20, and is configured to encrypt the highway ETC service data and store the data, so as to ensure data stability.

Specifically, the CAN module 70 is connected to the main control module 20, has a CAN function, and is configured to communicate with a vehicle, obtain vehicle status information, and transmit the vehicle status information to the main control module 20.

Specifically, the wireless internet module 80 is connected to the main control module 20 and is configured to upload or download data. In a specific embodiment, the wireless internet module 80 is a 4/5G internet module, which can realize 4/5G communication capability.

Specifically, bluetooth module 90 with master module 20 connects, can the social issue of person of facilitating the use, uses the ETC function needs, need not go to the activation of business outlets specially and use the product.

In addition, the vehicle-mounted equipment is provided with a USB module, can support USB communication, can transmit the vehicle-road cooperative traffic early warning information to a central control display screen of a vehicle through a USB for displaying and reminding, and can also receive other equipment of a user for expanding displaying and reminding.

The vehicle-mounted equipment of the embodiment can collect the operation information of the highway more comprehensively in real time by arranging various different functional modules, realize data sharing, reduce the number of times of unconventional inspection by management departments, reduce the labor cost, provide decision-making basis for emergency command based on dynamic continuous data, and realize reasonable scheduling; and an efficient and safe traffic transportation service system is further promoted, the long-time congestion phenomenon is relieved, the transportation time is shortened, the fuel consumption is reduced, and the atmospheric pollution is reduced to some extent.

The third embodiment:

referring to fig. 4, the utility model provides an ETC system, including as above second embodiment the mobile unit 100 to and set up in roadside equipment 200 of roadside, the mobile unit 100 through the radio frequency module with vehicle data high-speed transmission extremely the roadside equipment 200, perhaps, the mobile unit 100 receives the data of issuing that comes from the roadside equipment 200 through the radio frequency module is high-speed, can be dispatch notice data, warning data or real-time road conditions data and so on.

As shown in fig. 4, be provided with wireless radio frequency module in roadside device 200 equally, through set up wireless radio frequency module simultaneously at mobile unit and roadside device, and high-speed transmission ability based on wireless radio frequency module, can issue mobile unit 100 with richer road information fast, perhaps quick upload various data with vehicle operation in-process, make mobile unit 100 can carry out the data transmission of bigger data volume with roadside device 200 in the short time, further realize the vehicle and road coordination early warning report, reduce high-speed accident rate, promote high-speed user's experience and feel.

Referring to fig. 4, the ETC system of the present embodiment further includes an edge calculation unit 300, and the roadside device 200 is connected to the edge calculation unit 300, and is configured to issue the online data from the edge calculation unit 300 to the vehicle-mounted device 100 through the roadside device 200.

Fig. 5 is a view of an application scenario of the ETC system of the present invention, as shown in fig. 5, elements in the view are illustrated as follows:

and (B) point A: the RSU gantry system (the roadside device 200) can broadcast the vehicle and road cooperative traffic early warning information;

and B, point: landslide accident location;

and C, point: the RSU portal system can broadcast the vehicle and road cooperative traffic early warning information;

and D, point: the position of the vehicle collision traffic accident;

and E, point: the RSU gantry system (roadside equipment) can broadcast the vehicle and road cooperative traffic early warning information;

and F point: and the cloud server (the edge computing unit 300) is used for transferring and processing the early warning data.

In actual operation, when a vehicle at a point a passes through each RSU gantry system (roadside device 200) in sequence, the cloud server (edge computing unit 300) provides decision-making basis and road condition information for emergency command based on dynamic continuous data, and the vehicle-mounted device 100 arranged in the vehicle can respectively receive point B upper body landslide early warning and point D traffic accident early warning from the RSU gantry system, so that a driver can better deal with different road condition changes, the driving safety of the vehicle is improved, the coordinated early warning and broadcasting of a road are better realized, the high-speed accident rate is reduced, and the experience of a high-speed user is improved.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The vehicle-mounted equipment is characterized by comprising a main control module and a radio frequency module connected with the main control module, wherein the main control module controls the radio frequency module to send data to be transmitted to road side equipment or receive issued data from the road side equipment;

the wireless radio frequency module comprises a radio frequency transceiving selector switch, a first balun, a second balun, a frequency modulation and demodulation unit, a data packet processing unit, a register set and a transceiving antenna, wherein the register set is in communication connection with the main control module and is used for data transmission with the main control module; the register group is also connected with the data packet processing unit, the data packet processing unit is connected with the FM modem unit, the FM modem unit is connected with the RF transceiving switch through the first balun and the second balun, and the RF transceiving switch is connected with a transceiving antenna; the radio frequency receiving and transmitting switch is used for switching the wireless radio frequency module to enter a transmitting state, and data to be transmitted are transmitted to the register group from the main control module, sequentially pass through the data packet processing unit, the frequency modulation and demodulation unit and the second balun and are transmitted to the receiving and transmitting antenna for transmitting; the radio frequency receiving and transmitting switch is used for switching the wireless radio frequency module to enter a receiving state, and the receiving and transmitting antenna receives the transmitted data, passes through the first balun, the frequency modulation and demodulation unit, the data packet processing unit and the register set in sequence and transmits the data to the main control module.

2. The vehicle-mounted device according to claim 1, wherein the fm modem unit includes a receiving path and a transmitting path, the receiving path includes a low noise amplifier, a first mixer, an analog-to-digital converter, an fm demodulator, a data limiter, and 3 bandpass filters, the low noise amplifier, the bandpass filters, the first mixer, the bandpass filters, the analog-to-digital converter, the fm demodulator, and the data limiter are sequentially connected to form a receiving path, and the transmitted data from the transmitting/receiving antenna sequentially passes through the low noise amplifier, the first mixer, the analog-to-digital converter, the fm demodulator, and the data limiter for demodulation and then enters the packet processing unit;

the transmitting path comprises a power amplifier, a second frequency mixer, a digital-to-analog converter, a frequency modulation modulator, a Gaussian shaping filter and 3 band-pass filters, the band-pass filter, the power amplifier, the band-pass filter, the second frequency mixer, the band-pass filter, the digital-to-analog converter, the frequency modulation modulator and the Gaussian shaping filter are sequentially connected to form the transmitting path, and data to be transmitted from the data packet processing unit are transmitted by the transmitting and receiving antenna after being modulated and processed by the Gaussian shaping filter, the frequency modulation modulator, the digital-to-analog converter, the second frequency mixer and the power amplifier in sequence.

3. The in-vehicle device according to claim 2, wherein the fm modem unit further includes a high frequency oscillator and a phase-locked loop, the high frequency oscillator being connected to an input terminal of the phase-locked loop, an output terminal of the phase-locked loop being connected to the first mixer and the second mixer, for outputting a local oscillation signal to the first mixer and the second mixer.

4. The vehicle-mounted device of claim 1, further comprising a positioning module and a gyroscope, wherein the positioning module is connected with the main control module and used for transmitting real-time positioning data to the main control module, and the gyroscope is connected with the main control module and used for transmitting a vehicle running state to the main control module.

5. The vehicle-mounted device according to claim 1, further comprising a data encryption storage module, wherein the data encryption storage module is connected with the main control module and is used for encrypting and storing data.

6. The vehicle-mounted device of claim 1, further comprising a CAN module, wherein the CAN module is connected with the master control module, and the CAN module is used for communicating with a vehicle, acquiring vehicle status information and transmitting the vehicle status information to the master control module.

7. The vehicle-mounted device of claim 1, further comprising a wireless internet access module and a bluetooth module, wherein the wireless internet access module and the bluetooth module are connected to the main control module, and the wireless internet access module is used for uploading or downloading data.

8. The vehicle-mounted device of claim 1, wherein the modulation mode of the wireless radio frequency module is FSK modulation.

9. An ETC system, characterized by comprising the vehicle-mounted device according to any one of claims 1-8 and a roadside device arranged at a roadside, wherein the vehicle-mounted device is arranged in a vehicle, and the vehicle-mounted device transmits vehicle-related data to the roadside device at a high speed through a radio frequency module; or the vehicle-mounted equipment receives the issued data from the road side equipment through a wireless radio frequency module.

10. The ETC system according to claim 9, further comprising an edge calculation unit, wherein the roadside device is connected to the edge calculation unit and configured to issue online data from the edge calculation unit to the vehicle-mounted device through the roadside device.

Images